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How many moles of O^2- ions are in 0.55 mol of Al2O3? What is the mass in grams of the O^2- ions?
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Many radioactive atoms that have large masses undergo radioactive decay by releasing a particle that is identical to a helium-4 nucleus. what changes in the original atom are expected as a result of this natural phenomenon? the atomic number and the mass number will decrease. the atomic number and the mass number will increase. the atomic number will increase, and the mass number will decrease. the atomic number will decrease, and the mass number will increase.
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How many moles of O^2- ions are in 0.55 mol of Al2O3? What is the mass in grams of the O^2- ions?...
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